Mechanical bell-operating device.



J. GRAVELLE. MECHANICAL BELL' OPERATING DEVICE.

Patented 061 13,1908.

Zita euro: g1 Gr'a eZZ APPLICATION FILED AUG. 20, 1907- UNITED STATESPATENT OFFICE.-

JOSEPH GRAVELLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO0. A. BLUMHARD AND ONE-THIRD TO J. S. KOCH, OF PHILADELPHIA,PENNSYLVANIA.

MECHANICAL BELL-OPERATING- DEVICE. 7

Specification of Letters Patent.

Patented Oct. 13, 1908.

Application filed. August 20, 1907. Serial No. 389,411.

To all whom it may concern:

Be it known that I, JOSEPH GRAVELLE, a citizen of the United States,residing in the city of Philadelphia, State of Pennsylvania, haveinvented a new and useful Improvement in Mechanical Bell-OperatingDevices, of which the following is a specification.

V This invention relates to a call bell or other signal bell to beoperated by hand regulated mechanical means.

The object of the invention is a bell of the trembler type but havingmechanical means for operating substituted for electromagnets andbatteries.

The invention consists in the novel features of construction hereinafterdescribed, pointed out in the claims and shown in the accompanyingdrawings, in which Figure 1 is a detail perspective view of the bell, ahousing inclosing a portion of the mechanism being indicated in dottedlines. Fig. 2 is a detail side elevation of the operating mechanismremoved from the housing, certain shafts being shown in section, and theposition of the parts when the lever is drawn outwardly being shown indotted lines.

In these drawings A represents a metal plate having at its lower edge anangled foot portion A by means of which it can be secured in position,and mounted upon the plate A is a bell B. The front face of the platealso carries an angled and up wardly extending bracket 0. A lever E hasformed upon one side and intermediate its ends a toothed disk E forminga rack segment and the lever is pivotally connected to the plate A by asuitable pin passing through the center of said segmental disk E. A pullwire D is connected to one end of the lever E and a coil spring Gsecured at its lower end to the plate A has the upper end secured to theremaining end of the lever E. A shaft H journaled in the plate A and inthe bracket C carries a pinion J which meshes with the ratchet teeth ofthe segment E and also carries a toothed wheel A bell striker Kispivotally mounted upon a pin K carried by the bracket 0 and thestriker-rod is pivoted upon this pin and carries upon opposite sides ofthe said pin, teeth K which engage teeth of the wheel J.

It will be obvious that as the wire F is drawn outwardly the disk Ewillbe rotated, thus rotating the pinion J and wheel J, and the teeth ofthe wheel J being alternately in engagement with the teeth K will impartduring the rotation of said parts a trembling motion to the striker-rodK, thus sounding thebell in the same manner as an electromagnet.

A housing D shown in dotted lines incloses the bracket C, the lever Eand the adjacent parts.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is- A device of the kind described consistingof a bell, a pivoted toothed striker-rod, a lever, a spring connected toone end of the lever, a pull device secured to the opposite end of thelever, a shaft, a toothed-wheel on said shaft in engagement with a toothof the striker-rod, a pinion on said shaft, a ratchet segment engagingsaid pinion and carried by the lever midway its ends, the pivotal pointof the lever being at the center of said segment.

JOSEPH GRAVELLE.

Witnesses:

FRANK J. MOYER, ELMER E. OoLLINs.

